Vulnerability advisory

CVE-2026-20800

Notification API Leaks Private Repository Issue Titles After Collaborator Permission Revocation

Published Jan 22, 2026Updated Oct 28, 2026OSV record ↗

Also known as BIT-gitea-2026-20800GHSA-2vgv-hgv4-22mhGHSA-g54m-9f6g-wj7qGO-2026-4362

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected versions

Repository

Affected commits	Fixed by commit
GIT github.com/go-gitea/gitea ↗
All commits before 369830bada2fd8826a5135cb2fc66660a9bef708	`369830bada2fd8826a5135cb2fc66660a9bef708`
Also listed as affected (43) `v1.25.3` `v1.25.2` `v1.25.1` `v1.25.0` `v1.25.0-rc0` `v1.26.0-dev` `v1.25.0-dev` `v1.24.0-dev` `v1.22.0-rc1` `v1.23.0-dev` `v1.22.0-rc0` `v1.21.0-rc0` `v1.22.0-dev` `v1.20.0-rc0` `v1.21.0-dev` `v1.20.0-dev` `v1.19.0-rc0` `v1.18.0-rc0` `v1.19.0-dev` `v1.18.0-dev` `v1.17.0-dev` `v1.16.0-rc1` `v1.15.0-rc1` `v1.16.0-dev` `v1.15.0-dev` `v1.14.0-dev` `v1.13.0-dev` `v1.12.0-dev` `v1.10.5` `v1.11.0-rc1` `v1.10.0-rc1` `v1.11.0-dev` `v1.9.0-rc1` `v1.10.0-dev` `v1.9.0-dev` `v1.7.0-dev` `v1.6.0-rc1` `v1.6.0-dev` `v1.5.0-rc1` `v1.5.0-dev` `v1.1.0` `v1.0.0` `v0.9.99`

Description

Gitea's notification API does not re-validate repository access permissions when returning notification details. After a user's access to a private repository is revoked, they may still view issue and pull request titles through previously received notifications.

CVE-2026-20800

Affected versions

Repository

Description

References